Final answer:
To replace null values with 'n/a', you can use conditional statements or functions in programming languages like Python or SQL.
Step-by-step explanation:
To replace null values with 'n/a', you can use conditional statements or functions in programming languages like Python or SQL. In Python, you can use the if statement to check for null values and replace them with 'n/a'. For example:
if value is None:
value = 'n/a'
In SQL, you can use the CASE statement to handle null values. For example:
SELECT CASE WHEN column IS NULL THEN 'n/a' ELSE column END AS column_name
FROM table_name